Hi @henduman45! Thanks for posting.
Would you be able to share a picture of what you're seeing when you're connecting to your vehicle?
Based on your description, it sounds like your mobile device is attempting to connect via a Bluetooth connection to you Cadillac. Which would explain the 4 digit pin. I'm not sure of the 7 or 9 digit pin, I haven't seen that before.
Let me know if you have trouble uploading the picture. Thanks!
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